Typewriting machine



Oct. 17, 1933. F, A. HART I TYPEWR'ITING MACHINE Filed Oct. 15, 1929 5 Sheets-Sheet 1 INVENTOR WITNESSES ATTORNEY Oct. 17, 1933. F. A. HART TYPEWRITING MACHINE Filed Oct. 15, 1929 5 Sheets-Sheet 2 WITNESSES INVENTOR ATTORNEY Oct. 17, 19 330 F. A. HART TYPEWRITING MACHINE Filed Oct. 15, 1929 3 Sheets-Sheet 3 INVENTOR ATTORNEY Patented Oct. 17, 1933 UNITED STATES PATENT OFFICE to Remington Typewriter Company,

Ilion,

N. Y., a corporation of New York Application October 15, 1929. Serial No. 399,846

38 Claims. (Cl. 19766) My invention relates to typewriting and like machines and is directed more particularly to carriage return mechanism for such machines.

The main object of my invention, generally stated, is to provide comparatively simple and inexpensive power actuated carriage return mechanism, which is sturdy in construction, not liable to be injured or broken in use and which is highly efficient and reliable in its operation.

Another object of -my invention is to provide simple and eflicient means cooperative with the power actuated carriage return mechanism for maintaining it ineffective or inoperative.

A further object of my invention is to provide simple and efficient means which will prevent the carriage return mechanism from being set into operation in the event that the carriage is in the returned position or has not advanced far enough from such position to permit the carriage return mechanism to function properly.

A still further object of my invention is to provide carriage return mechanism of the character specified which may be readily embodied in existing typewriting and like machines without modifying, or materially modifying such may chines.

To the above and other ends which will herein- 7 after appear, my invention consists in the features of construction, arrangements of parts and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters designate corresponding parts in the different views,

Fig. 1 is a fragmentary, side elevation, with parts broken away, of a typewriting machine equipped with the devices of my invention.

Fig. 2 is a fragmentary, top plan view of the 40 same.

Fig. 3 is a front elevation of the machine with parts in section and broken away.

Fig. 4 is a fragmentary, detail, front elevation of parts of the structure shown in the actuated position.

Fig. 5 is a sectional detail, showing some of the means employed for connecting the auxiliary motor supporting frame to the frame of the typewriting machine.

Fig. 6 is a detail, fragmentary, horizontal sectional view taken on the line 6-6 of Fig. 3 and looking in the direction of the arrows at said line, the view showing certain of the connections for controlling the switch for the motor.

In the different views I have shown only so much of a No. Smith Premier typewriting machine as is necessary to illustrate my invention in its embodiment therein.

While the devices of my invention may be readily incorporated in this machine without 60 modifying, or materially modifying, the existing structural features thereof, it should be understood that the invention is not restricted to its employment in such machine but it may be embodied in typewriting and like machines generally, wherever found available.

The frame of the machine comprises the usual base 1, corner posts 2 and top plate 3. Supporting brackets 4 are secured to the top plate 3 and have afllxed thereto by screws 5 upper and lower guide rails 6 and 7 respectively for the carriage. These rails have oppositely disposed grooves or ways to receive antifriction, crossed, bearing rollers 8 which are received in the oppositely grooved ways of a cross bar 9 of the carriage, 75. thus supporting the carriage for travelingmovement over the top plate 3 from side-to-side of the machine. Secured to and projecting forward from the cross bar 9 are end bars 10 provided with bearings for a platen shaft 11 on which a cylindrical platen 12 is mounted. To one end of this shaft is secured a finger wheel 12 by which the platen may be turned.

The carriage is advanced by the usual spring drum (not shown) under control of the escapement mechanism commonly employed and a portion only of which is shown. Thus, arms 13 (Fig.

1) pivoted at 14v on the carriage, support a feed rack 15 which meshes with a feed pinion 16 con-v nected to an escapement wheel 17. The escapement wheel is controlled by the usual feed dogs (not shown) to afford a letter-space advance of ,the carriage at each actuation of a printing key or the space key. The feed rack 15 is connected at each end with an arm 18 that terminates in a release key 19. 'A depression of either release key results in lifting the feed rack out of mesh with the feed pinion 16 and freeing the carriage from control of the escapement mechanism.

The usual tabulator mechanism, a part only of which is shown, may be employed. Thus, a column stop bar 20 is secured to rearwardly extending lugs 21 on the carriage. This bar has interdental spaces 22 at letter-space intervals substantially throughout the length thereof for the reception of bifurcated column stops23, each provided with a spring detent 24. The column stops coact with key controlled denominational stops, not shown.

A margin-stop-carrying-bar 25 is mounted on the frame of the machine on supporting lugs 26 and 27 secured to the upper fixed guide rail 6 for the carriage. The bar has interdental spaces 28 substantially through the length thereof. Two so-called margin stops 29 and 30 are mounted on this bar for adjustment along it to different set positions where they may be secured or locked to the bar by the usual latches or looking devices carried by said stops and engageable in interdental spaces 28. Each latch has a finger piece 31 by which it may be released from looking engagement with the bar 25. This bar 25 is mounted on pivot pins 32 carried by the lugs 26 and 27 to afford a rocking movement of the bar on its longitudinal axis for purposes which will hereinafter appear.

Pivotally supported at 33 on the carriage is a counter stop member designated as a whole by the reference numeral 34. An upright arm 35 of this member coacts with an abutment 36 secured to the carriage and which limits the pivotal motion 41 on the stop 29 which ordinarily acts as a linelock stop.

of the member 34 in one direction. A screw and inclined slot connection 3'7, 38 enables the abutment 36 to be adjusted to right or left on the car riage and thus vary the point of arrest ofthe member 34 by said abutment. A coiled spring 39 is connected at one end to the'member 34 and is anchored at its other end to the carriage. The force of this spring is exerted to normally maintain the upright arm 35 against the abutment 36. The arm 35 is arranged to coact with a forwardly extending projection 40 on the right hand or margin stop 30 and arrest the carriage in its return movement without transmitting a pivotal movement to the counter stop 34. However, when the carriage travels in the opposite directionthe arm 35 coacts with a forward projection when the arm 35 engages the projection 41 a movement of the member 34 around its pivot 33 is effected and ordinarily this pivotal movement of the, member 34 transmits motion to f the usual line lock mechanism (not shown) and locks the machine against operation. However,

' may be omitted from the machine or disconnected.

for the purposes of'the present invention the line lockv devices with which the member 34 ordinarily coacts may be disregarded, and in fact The features of the construction as thus far described are the same as those employed in the No. Smith Premier machine but slight changesare made therein in some instances as will presently appear. In the usual construction the margin stop bar 25 has a pivotal movement on its pivots 32 as hereinbefore described, and for purposes that need not be entered into herein. In

accordance with my present invention I mount the bar 25 so that it also has a limited longitudinal sliding movement on its pivots 32 in order to open a motor switch and clutch by the longitudinal movement of the bar in one direction and to close such switch and clutch by a movement of said bar in the opposite direction, as will hereinafter clearly appear. I

In the present instance each pivot 32 is formed as a part of a screw 42, threaded into a tapped 'relasedfrom its locking means.

its position of arrest relatively to the machine in both directions.

There are spring means, as will hereinafter appear, for shifting the stop carrying bar '25 to the left. However, a detent or positively acting looking means is provided by the present invention to hold the bar 25 at the. end of its right-hand throw against the action of said spring means. The bar is thus held indefinitely or until the bar is Thus, in the present instance, I provide a catch or lock 44 pivoted at 45 to the lug 27. A stop 46 limits the upward motion of the catch to its normal position, whereitis normally held by a spring 47. The nose of the catch is beveled at 48 for co operation with a beveled face 49 on a depending bracket arm or engaging member 50 secured to the bar 25. When the bar 25 is shifted. to the right by the arm 35.engaging the projection 40, then the part 50 will depress the free end of the catch 44 until the part 50 passes the abrupt engaging face 51 of the catch. The catch will then spring up into the path of the member 50, thereby preventing its return movement and that of the bar 25 to the left. This operation opens the switch and clutch and. stops the motor, as will presently appear. It will be seen, however, that when the parts are in this condition if the bar 25 be given a clockwise rocking movement, (as the construction is viewed from the right-handl end of the machine), then the engaging member 50 will be released from the catch 44 and the bar 25 is free to be moved logitudinally to the left by its spring means, thereby closing the switch and clutch to return the carriage, as will presently 1 appear.

The rocking of the bar 25 as specified above may be eifected in either of two ways, either automatically when the carriage reaches the end of a line, which end is determined by a setting of the stop 29, or at the will of the operator be;

'fore the carriage reaches the end of a line, by the actuation of a special carriage return key The automatic operation referred to above is brought about by the arm 35 coacting with the 1 projection 41 on the stop 29 as the carriage approaches the end of a line. This results in first swinging the member 34 on its pivot 33 in a clockwise direction, as the parts are viewed in Fig. 3. This pivotal motion of the member 34 continues 1 until it reaches the position shown in Fig. 4 where it is arrested by a'flxed stop 52 on the cross bar 9. of the carriage. At this time a small projection 53 on the member 34 comes beneath and coacts with a cam face 54 on the projection 41,. 1 as shown in Fig. 4. Since the member 34 can turn nofurther at this time, a continued movement of the carriage to the left will result in camming the member 41 to the elevated position. This causes the stop bar 25 to receive a: 1 clockwise movement (as the parts are viewed from the right-hand end of the machine) causing the bar to be released from control of its lock or latching device 44. This enables the stop bar 25 to be shifted to the left by its spring means and to close the motor switch and clutch and return the carriage, as will presently more clearly appear. This constitutes the automatically operating means for releasing the stop carrying bar 25 from its locking means and will from its lock 44 in order that a longitudinal movement of said bar to the left may be effected, as previously described, to bring about a return movement of the carriage from any position in its line of travel and before it has reached the end of a line to be automatically returned.

A bracket plate of which the member 50 forms a part is fixed to the stop bar 25 and has a rearwardly projecting arm 56 (Figs. 1 and 2) to which a link 57 is pivoted at 58. This link extends down through an opening 59 in the top plate of the machine and is pivoted at 60 to one arm 61 of an angular lever. Said lever is pivoted at 62 to a fixed bracket arm 63 secured to one of the corner posts 2 of the machine. A second depending arm 64 on the angular lever has a spacing block or plate 65 riveted thereto, the same rivets 66 securing a guide plate 67 to the arm 64, the spacing plate maintaining the lower end portion of the guide plate spaced apart from the arm 64. This space is provided to receive the free end portion of an actuating member 68, said member being guided in its movements between the inner faces of the guide plate 6'1 and arm 64. The lower end of the arm 64 is connected to one end of a contractile returning spring 69 that has its opposite end anchored to a pin '70 on the base of the machine. This spring returns the angular lever'61, 64, together with the parts controlled thereby, to normal position.

The actuating member 68 has at one end thereof an engaging part or upwardly extending hooklike projection 71 that in the normal position of the parts is so disposed as to engage the spacing plate 65 on the arm 64 of the lever and actuate said lever as the member 68 is pulled forward.

The member 68 has an upper cam edge '72 which coacts with a cylindrical Jabutment '73 that has an eccentrically disposed threaded supporting pin 73 with a lock nut thereon. This supporting pin passes through anopening in the bracket arm 63 and affords a rotative adjustment of the eccentrically disposed abutment to raise or lower its effective contact portion. When the lock nut is tightened, the abutment is held fixed to the bracket arm 63 and projects laterally therefrom and overlies the cam 72. A contractile spring 74 is connected at one end to the actuating member 68 and at its other end to an ear 75 on the bracket arm 63, the spring thus exerting its force to hold the cam 72 against the pin 73.

The forward end of the actuating member 68 is pivoted at 76 to an upstanding arm '77 of an angular lever pivoted at '78 to the frame of the machine. The other, forwardly extending, arm 79 of this lever projects to the key board of the machine and is provided with a suitable key by which the member 68 and the parts controlled thereby may be actuated.

Suitable adjustable means are provided to limit both the actuating and return movement of the member 68. In the present'instance such adjustable means comprises a screw 80 threaded through and adjustable on an off-set ear 81 on the member 68. This screw is held in its adjusted position by a lock nut 82 and has a contactive engagement at one end with a fixed abutment 83 and at its other end with a fixed abutment 84 thus limiting the longitudinal movement of the actuating member 68 to and from normal position without, however, interfering with the lateral movement of said member under control of the cam 72 and abutment 73.

In the operation of these devices under control of the key a depression of the key results in pulling forward the actuating member 68 and trans-' mitting movement through the intermediate connections to the stop carrying bar 25 and rocking the latter to effect its release from the lock 44. As soon as such release is brought about the bar 25 is immediately shifted to the left by its spring. means and the motor is energized and connected to the carriage to return it. It will be understood that as soon as the stop bar 25 is shifted to the left as stated it cannot reengage the lock 44 if at this time the bar 25 is rocked back to normal position; it requiring also a shifting of the bar to the right to bring about such reengagement. The timing of the operation of the parts is such that on. the depression of the carriage limit of its depression but after the parts have been conditioned to return the carriage.

An adjustment of the eccentric abutment 73 affords a nice timing of the parts, so that the break in the connections will not occur until the proper instant with reference to the release of the stop carrying bar 25.

By breaking the connections between the carriage return key and the carriage return devices controlled thereby, no harm can result from the operator holding the key depressed, even until after the carriage has been returned. This construction provides, therefore, that in the event of the operator holding the carriage return key depressed it cannot interfere with the automatic operation of the parts to shut off the motor and open the clutch when the carriage is returned to the beginning of the line position. In other words the automatic trip-off device affords a disconnection between the return key and the stop bar 25 immediately after the motor has been made available to return the carriage. Therefore, the spring 69 will immediately rock the bar 25 back to normal position, so that when it is picked up 'by the stop 34 and moved longitudinally to the right during the return of the carriage to stop the motor and disconnect the clutch,; the lock 44 will function to retain the said bar 25 in the righthand position until the bar is again released therefrom, either by an automatic rocking of the bar as the carriage reaches the end of a line, or by the rocking of said bar by the carriage return key.

'Thus far I have described the means for controlling the movements of the stop carrying bar 25 and have referred in general terms to the control of a clutch and motor switch thereby. I will now describe the means whereby said clutch and switch are opened and closed by or under control of said stop carrying bar.

A casting 85 in the nature of an auxiliary frame is detachably and adjustably secured to the frame of the typewriting machine by suitable means such as screws 86, 87 and 8'7 and bushings 88. The screws 86 are received in and pass through tapped openings in bushings 88 and engage at their lower ends in tapped openings in the base 1 of the typewriter frame and are held by lock nuts 89. The bushings 88 are threaded into the frame 85 and bear at their lower ends against the upper side of base 1 of the typewriter frame. There are two screws 87 received in tapped openings in the base 1 and arranged on opposite sides of the central screw 87, as disclosed in Fig. 5. The screws 87 bear at their irmer ends against a part 91 in the nature of a housing which is integral with and forms part of the motor supporting frame 85. The central headed screw 87 on the other hand passes loosely .through an enlarged opening in the base 1 and is .aft adjustment relatively to the typewriter frame,

in order that parts carried by both frames may be brought into proper relation or alignment and the frame with the parts carried therebymay be applied to or detached from the typewriter as a single unit and in the nature of an attachment. Moreover, the screws 87 constitute bearing or push screws, whereas the screw 87 constitutes a connecting pull screw. This arrangement provides for obtaining an up and down and also a lateral or fore and aft teetering adjustment of the frame 85 relatively to the typewriting machine, so that practically a universal adjustment of the motor frame 85 is provided, as well as an up and down and right and left bodily adjustment thereof. Therefore, such adjustments will meet any requirements encountered for the attachment of the frame 85 to bring about a proper correlation or alignment of the parts on said frame with parts carried by the frame of the typewriting machine.

The frame 85 constitutes a support for an electric motor 90 and various parts associated with the motor for controlling it and for control by the motor of parts of the typewriting machine. The motor is fixedly though detachably'mounted on top of the housing 91 which, as pointed out above, constitutes part of the frame 85. This housing is provided with a socket 91* (Fig. 1)

to receive a plug by which connection to the power line may be effected and with connections from said socket to the motor.

The motor shaft 92 is horizontally arranged and extends forward where it receives a bearing in a member 93 that forms part of the frame 85.

The forward end of the shaft 92 carries a pinion 94 that meshes with a relatively larger gear 95 arranged above the pinion 94 and mounted to turn freely on a shaft 98 which is supported near both ends in bearings in the substantially U- shaped part 93 of the frame 85.

The gear wheel 95 has one member 97 of a two-part crown clutch formed integral therewith. The second member 98 of this clutch is fixed to rotate with the shaft 98 by 'a spline lndgmove connection 99-100 which, however. permits a shifting of the clutch section 98 axially on the shaft 98. In order to thus shift the clutch section 98 and throw it into and out of engagement with its companion clutch'section 97. said section 98 is provided with a peripheral groove 101 in which a downwardly extending pin 101' engages, said pin being carried by an arm 102 thatis pivoted at one end to turn freely on an upright rock shaft 103. The free end of the arm 102 isconnected to one end of a contractile spring 104 anchored at its opposite end to a pin 105 fixed to the frame 85. The force of the spring 104 is exerted to shift the section 98 and close the clutch, and thus connect the shaft 96 and gear 95 to turn together. However, the clutch controlling arm 102 is normally held against the force of the spring 104 by an arm 108 adjustably fixed to the shaft 103 by a clamp 10'? and bolt 108. Said arm 106 extends menses in the rear of and engages an upwardly projecting pin 101 on the arm 102.

The forward end of the shaft 96 carries a pinion 109 that meshes with a rack 110 carried by the carriage. This rack is operatively connected to the usual line spacing mechanism, as will hereinafter appear, to first actuate, it to advance the platen 12 and then return the carriage to the right to the beginning of a line position. This occurs when the clutch 96--97 is closed and the motor is set in operation to turn the gear 95.

The foregoing result is brought about by controlling the clutch and the switch (the latter of which is to be presently described) from the stop carrying bar 25. Thus said bar has a depending pin 111 on the lower side thereof which is received in the slot 112 in the bifurcated end of a crank arm 113 fixed on the upper end of the shaft 103. This shaft is supported to rock in bearings in the frame 85 and extends to the lower portion thereof. Itwill be seen that the connection between the bar 25 and the arm 113 does not interfere with an independent rocking of the, bar

25 butany longitudinal movement of the latter will be transmitted to the arm 113 and the parts controlled thereby. Thus, when the bar 25 is shifted to the right to the limit of its'movement the clutch will be opened against the force of the spring 104, whereas when the bar 25 is shifted to the left to the limit of its movement the obstructing arm 106 will be withdrawn from the path of the pin 101 enabling the spring 10-1 to close the clutch.

In the present construction I have provided a motor switch or circuit breaker which is opened or closed at the same time that the clutch 96-97 is opened or closed, the parts being timed to close the clutch slightly in advance of .the switch. This construction includes a crank arm 114 (see Fig. 6) adjustably connected to theshaft 103 near the lower end thereof by a clamp 115 and bolt 116. The arm 114 carries a pin 117 which is received in a slot 11'? in a sliding rod 118. This rod is supported in part for sliding movement in a bearing opening in 'a bracket 119 secured to the frame 85. The forward end of the rod is pivoted to the upper end of a supporting link 120 which in turn is pivoted at its lower end, at 121,

to a bracket arm 122 secured to the frame 85. 'A clamp 123 is secured by a screw 124 to the rod 118 at any position to which said clamp may be adjusted along the rod. A coiled expansion spring 125 surrounds the rod 118 and bears at one end against the bracket 119 and at its other end against the clamp 123 thus exerting its force to move the rod rearward to the limit of its mocoacts with a switch or circuit breaker that W controls the motor. Thus, the rear end portion of therod 118 is notched at 126 to receive and coact with a block of insulating material 128 secured to one end of a leaf spring 129 carrying a contact 130 in the electric circuit by which the tion with an arm 132' through which the circuit is completed. In the normal position of the parts the circuit is broken as indicated in Fig. 1. When, however, the clutch 9798 is closed,

' with the contact 131 and thus close the-circuit and start the motor 90. The motor will .continue to run until the carriage has been returned. to the beginning of the line positionwhen the clutch 97--98 will be opened as previously described. The turning of the shaft 103 by which the clutch is opened also results in shifting the rod 118 forward to the Fig.1 position, thereby opening the switch or circuit breaker and stopping the motor.

It is sometimes desirable to render and maintain indefinitely the carriage return mechanism. as a whole inoperative. I have provided very simple means whereby this may be readily accomplished. The margin stop 29 is provided with an extension 133, (Figs. 2 and 3), which projects to the left therefrom. This extension may be in the nature of a leaf spring secured at one end to thestop 29 and hearing at its free end' on the stop bar 25. By shifting the stop 29 along the stop bar 25 to the left until the end of the extension 133 abuts the left-hand screw bushing 42, and locking the stop 29 in such position, the bar 25 becomes locked against longitudinal movement, assuming that the bar is in the right-hand position when the stop 29 is shifted to the left and locked on the stop bar as described. Inasmuch as it is the longitudinal shifting of the stop bar 25 which controls the operation of the return mechanism, it will be understood that the locking of this bar permanently against such longitudinal movement in the manner described renders the switch, the clutch and in fact the carriage return mechanism permanently ineffective, or inoperative, or until such time as the projection 133 is shifted to the right away from the left-hand bushing 42, to permit the stop bar 25 to function.

I have hereinbefore indicated that when the clutch 97-98 and the switch 129, 132 are closed, whether automatically or by an actuation of the carriage return key, the first part of the movement of the rack 110 to the rightwill resultin actuating the line spacing mechanism, before the return of the carriage is effected. The means by which this result is attained are asfollows:

The left-hand end of the rack bar 110 has a bracket 134 fixed thereto, and this bracket carries a depending pin 135 received in a slot 136 formed by the rear bifurcated end 137 of a lever 138. This lever is pivoted at 139 to a bracket 140 secured in turn to an extension bracket 141 on the carriage. A spring 142. is connected to the lever 138 and tends to turn it in an anti-clock--v wise direction as the parts are viewed in Fig. 2.

The forward end of the lever 138 is pivotally connected to one end of a looped wire link 143; Received within this link is the stem of a headed pin 144 that projects laterally from a crank arm 145 fixed on a horizontally disposed rock shaft 146 mounted to rock in a bearing 147 on the carriage. crank arm 145 and is connected at one end to said hub and therefore is connected to the rock shaft 146 to return it to normal position. The rear end portion of the rock shaft 146 has a collar or hub 149 secured thereto and said hub carries a crank arm 150 which engages in a notch in a portion of an angular line spacing pawl 151 ber 157.

A spring 148 surrounds a hub 145 of the pivoted at 152 ona carrying arm 153. This arm 153 is pivoted to turn freely on the shaft 146.

A stop pin 154 extends in the path of the arm 153 and limits the movement of said arm and the parts controlled thereby back to normal position. The pin 154 is carried by a yoke piece 155 that turns freely on the shaft 146 to any one of three different positions.

In each of said positions the yoke is held by a spring-pressed bolt 156 that engages in an opening in a fixed segmental mem- Therefore, the yoke 155 and pin 154 may be locked in any one of the three positions to which the yoke may be adjusted. This limits the return movement of the pawl 151 and parts by which it is actuated and provides for line spacing the platen 12 the distance of one, two or three teeth 158 of the line spacing wheel 159. The forward end of the shaft 146 is provided with a handle 160 by which the platen may be line spaced by hand, as well as automatically. A spring pressed .det'entroller 161 coacts with the line spacing wheel in the usual manner.

The line spacing mechanism per'se is of the usual construction employed in the #60 Smith Premier machine, though obviously any suitable line spacing mechanism may be employed for the purposes of my invention.

The first part of the rocking movement of the shaft 146 carries the line spacing pawl into engagement with a tooth 158 of the line spacing wheel and a further movement of the shaft turns the wheel and platen the requisite distance determined by a setting of the yoke 155 and the parts controlled thereby. 7

An actuating movement of the line spacing no mechanism is limited by an adjustable screw stop 162 threaded into a tapped opening in an ear 163 on the bracket 134 and held in its adjusted position by a lock nut 164. The inner end of the screw stop 162 coacts with the left hand end of 1 5 the cross bar 9 of the carriage to limit the actuating movement of lever 138 relatively to the carriage.

From an inspection of Fig. 3 it will be seen that rack bar is connected to the carriage by a lost motion connection that affords an initial movement of said bar independently of the carriage at the first part of the actuation of the carriage return mechanism. This lost motion connection comprises opening or slots 165 in the In each slot 165 is received a supporting pin 166 that spans a transverse guide slot 167 (Fig. 1) in each of the lugs 21 by which the column stop bar 20 is connected to the carriage. The independent longitudinal movement of the rack bar 110 to the left is limited by the pins 166 abutting the right-hand end walls of the slots 165, whereas the independent longitudinal movement of the rack bar to the right is limited by the screw stop 162 engaging the cross bar 9 of the carriage.

It will be understood that when the clutch 9'7--98 and the switch 129, 132 are closed the pinion 109 will be set in motion thereby shifting the rack bar 110 to the right. The.first part of this motion will effect a movement of said bar independently of the carriage to actuate the line spacing mechanism. When this has been completed the screw stop 162 reaches the cross bar 9 of the carriage and the carriage will then be returned to the right until the carriage approaches the beginning of a line, when the member 34 strikes the projection 40 and shifts the stop carrying bar 25 to the right. This last mentioned movement results in opening the clutch and switch and in looking the stop bar by the catch 44 at the right-hand end of the throw of said bar where it remains until the bar is again rocked to release it, either automatically at the end of a line or at any time by an actuation of the carriage return key.

In order to insure a sufficient movement of the carriage tothe left from its extreme right hand position to afiord a proper functioning of the carriage return mechanism, 1 have provided auto matically operating locking means for preventing an. actuation of said return mechanism until said suficient distance has been reached. In the pres ent instance such distance is two letter spaces although it may be more or less than said two spaces. The simple expedient provided in the present instance for this purpose is to form the stop member 34 with a rightward extension or looking member 168. This extension is adapted to overlie the projection 40 on the right-hand stop 30 to the extent of a little less than two letter spaces when the carriage is in the extreme righthand position. This will prevent a rocking of the bar 25 by an operation of the return key until after at least two strokes have been made on a printing key or the usual space key if the carriage has been returned to the extreme right, and this two letter space distance will insure a proper actuation of the carriage return mechanism should it be actuated at this time. After the operator has advanced the carriage a distance of two letter spaces the lock 168 is freed, and at any time thereafter the carriage retum key may be actuated to return the carriage from any point in its travel prior to the time the automatic actuation of the carriage return mechanism takes place.

It is thought that the operation of the mechahism in its entirety will be understood from the foregoing description nevertheless such operation will be briefly described.

The parts being in the positions represented in Figs. 1, 2 and 3 of the drawings the operator proceeds with the writing. When the end of the line is reached the stop bar 25 will be automatically rocked to release it from control of its lock 44. The springs 39 and 125 then will be eflective to shift the stop bar 25 to the left thereby turning the shaft 103. This results in closing the clutch 9798 and the switch or circuit breaker 1'30, 182 energizing the motor and driving the pinion 94. The pinion 94 first shifts the rack bar 110 to the right independently of the carriage to actuate the line spacing mechanism. When this is completed the screw stop. 162 contacts with the carriage and the latter will be returned to the right. As the carriage approaches the beginning of the line position the stop member 34 coacts with the projection 40 shifting the stop bar 25 to the right until itis caught and locked by the catch 44. The rightward movement of the stop bar results in turning the shaft 103 and opening the clutch 97-98 and switch 129, 132, thus de-energizing the motor and disconnecting it from the carriage.

Should the operator atany time desire to return the carriage before it reaches the end 01 the line, a depression of the carriagerelease key will result in rocking the stop carrying bar 25, re-

leasingitfromitslockflandenablingthebarto menses holding the carriage release key depressed, since the trip-off devices intermediate said key and the bar 25 enables the latter to immediately rock back to normal position after its release from the lock 4e by the carriage return key, so that the bar is immediately restored to a position where it may reengage the lock 44 when the bar is picked up by the carriage and returned to the.right just prior to the arrest of the carriage. This, therefore, results in opening the clutch and switch and conditioning the mechanism for the next operation on the advance of the carriage.

It will be seen that I have provided comparatively simple means for attaining the ends specifled; that the construction is sturdy and reliable in use; can be manufactured for a comparatively small cost; is not liable to be injuredor broken in use; is highly effective and that various adjusting means have been provided to assure a proper relative timing in the operation of the parts. 1

Various changes may be made in the construction, and some of its features may be employed without others, without departing from my invention as it is defined s in the accompanying claims,

What I claim as new and desire to secure by Letters Patent is: I

l. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said bar at one end ofv its longitudinal movement and from the control of which lock the bar is released by its rocking movement, a motor, a clutch between said motor and carriage, said clutch being controlled by the longitudinal movement of said bar, means controlled by the movement of the carriage for moving the bar in one direction for opening said clutch and engaging the bar with its lock, spring means for shifting said but longitudinally in the opposite direction when it is released from its locking means and for closing said clutch, and means for rocking said bar to release it from said lock.

2. The combination of a carriage, andreturn mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively 1 switch and engage the bar with said lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its locking means and for closing said switch, and

, means for rocking said bar.

3. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said bar at one end of its longitudinal movement and from the control of which look the bar is releasedby its rocking movement, an electric motor for returning the carriage, a. switch for controlling said motor, a

clutch between said motor and carriage, said switch and clutch being controlled bv the long- 1501- tudinal movement of said bar, means controlled by the movement of the carriage for moving said bar longitudinally in one direction to open said switch and clutch and engage the bar with said lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its lock and for closing said switch and clutch, and means for rocking said bar to release it from said lock.

4. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, a motor, a clutch between said motor and carriage, said clutch being controlled by the longitudinal movement of said bar, means controlled by the movement of the carriage for moving the bar in one direction for opening said clutch and engaging the bar with its lock, spring means for shifting said bar longitudinally in the opposite drection when it is released from its locking means and for closing said clutch, and means operating automatically when the carriage reaches the end of a line for rocking said bar to release it from said lock.

5. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, a motor, a clutch between said motor and carriage, said clutch being controlled by the longitudinal movement of said bar, means controlled by the movement of the carriage for moving the bar in one direction for opening said clutch and engaging the bar with its lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its locking means and for closing said clutch, means operating automatically when the carriage reaches the end of a line for rocking said bar to release it from said lock, and key controlled means operable at will for rocking said bar and returning the carriage before it reaches the end of a line.

6. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, a motor, a clutch between said motor and carriage, said clutch being controlled by the longitudinal movement of said bar, means controlled by the movement of the carriage for moving the bar in one direction for opening said clutch and engaging the bar with its lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its locking means and for closing said clutch, means operating automatically when the carriage reaches the end of a line for rocking said bar to release it from said lock, and key controlled means operable at will for rocking said bar and returning the carriage before it reaches the end of a line, said key controlled means including a trip-oil device that enables the connection between the key and bar to be broken, whereby the bar is freed from control of the key and may return to normal position independently thereof.

'7. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said'bar at one end of its longitudinal movement and from the control of which look the bar is released by its rocking movement, an electric motor for returning the carriage, a switch for controlling said motor, said switch being controlled by the longitudinal movement of said bar, means controlled by the movement of the carriage for moving said bar longitudinally in one direction to open said switch and engage the bar with said lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its locking means and for closing said switch, and means operating automatically when the carriage reaches the end of a line for rocking said bar to release it from said lock.

8. The combination of a carriage, and return mechanism therefor comprising. a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a positively acting lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, an electric motor for returning the carriage, a switch for controlling said motor, said switch being controlled by the longitudinal movement of said bar, means controlled by the movement of the carriage for moving said bar longitudinally in one direction to open said switch and engage the bar with said lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its locking means and for closing said switch, means operating automatically when the carriage reaches the end of a line for rocking said bar to release it from said lock, and key controlled means operable at will for rocking said bar and returning the carriage before it reaches the end of a line.

9. The combination of a carriage, a platen carried thereby, line spacing means for said platen, and mechanism for actuating said line spacing means and for returning the carriage comprising a margin-stop-carrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, a motor, a clutch between said motor and said line spacing means to effect an actuation of the latter and a return of the carriage, said clutch being controlled by a longitudinal movement of said bar, means controlled by the movement of the carriage for moving the bar in one direction for opening said clutch and engaging the bar with its lock, spring means for shifting said bar longitudinally in the opposite direction when it is released from its locking means and for closing said clutch, and means for rocking said bar to release it from said lock.

10. The combination of a carriage, a platen carried thereby, line spacing means for said platen, and mechanism for actuatingsaid line spacing means and for returning the carriage comprising a margin-stop-carrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, an electric motor, a switch for said motor, a clutch between said motor and said line spacing means to cfieot an actuation of the latter and. a return of the carriage, said clutch and switch being controlled by e longi tudinal movement of said bar, means controlledby the movement of the carriage for moving the bar in one directionfor opening said clutch and switch and for engaging the bar with its lock, spring means for shifting said bar longitudinally inthe opposite direction when it is released from its locking means and for closing said clutch and switch, and means for rocking said bar to release it from said loch.

11. The combination or a carriage, aplaten carried thereby, line spacing means for said platen, and mechanism for actuating said line spacing means and for returning the carriage comprising a. margin-stop carrying-ber mounted to rock on its longitudinal axis and also to move longitudinally, a lock for holding said her at one end of its longitudinal movement and from the control of which look the bar is released by its rocking movement, a motor, a gear driven by said motor, a rack carried by the carriage and having necrosis opening said clutch and engaging said bar with said loch.

a clutch intermediate said gear and motor and a lost motion connection therewith, said racir is released from its'lockng means and for closing the clutch, and means for rockingsaid bar to release it from said lock.

12. The combination of a carriage, a platen carried thereby, line spacing means for said platen, and mechanism for actuating said line spacing means and for returning the carriage comprising a margin-stop-carrylng-bar mounted to rock onits longitudinal axis and also to move longtudinally, a lock for holding said bar at one end of its longitudinaLmovement and from the control of which look the bar is released by its rocking movement, an electric motor, a switch for said motor, a. gear driven by said motor, a rack carried by the carriage and having a. lost motion connection therewith, said rack being operativelyconnected to said line spacing means and meshing with said gear, a clutch intermediate said motor and gear, said switch and clutch being controlled by a longitudinal movement of said bar, means controlled by the movement 01 the carriage for moving said bar longitudnall'y in one direction for opening said switch and clutch and for engaging the bar with its-lock,

spring means for shfting said bar longitudinally in the opposite direction when it is released from its locking means andfor closing the switch and clutch, and means for rocking said bar to release it from said lock.

13. The combination of a carriage, and

1 mechanism therefor comprising a margin-stopcarrying-bar mounted torock on its longitudinal axis and also to move longitud nally, a1 lock for holding said bar at one end of its longitudinal 14. The combination of a carriage, and return mechanism therefor comprising a margin-=stop= carrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a lock for holding said her at one end of its longitudinal movement and from the control of which loci;

the bar is released. by its rocking movement, a

motor, a gear driven by said motor, a rack car-=- ried by the carr'ege and meshing with said gear,

controlled by a longitudinal movement of said bar, means controlled by the carriage for moving said her longitudinally in one direction for opening said clutch and engaging said bar with its loch, spring means for shifting said bar longitudinally in the opposite direction when it is released from its lock and for closing said clutch, means operating automatically when the carriage reaches the end of a line for rocking said bar to release it from said lock, and key actuated means operable at will for rocking said bar and returning the carriage before it reaches the end of a line.

15. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a lock for.

holding said bar atone end of its longitudinalmovement and from'the control of which look the bar is released by its rocking movement, a motor, a. gear driven by said motor, a rack carried by the carriage and meshing with said gear, a clutch intermediate said gear and motor, a spring operated arm for closing said clutch, a member connected to and controlled by said bar and cooperative wlth said arm to hold it against the holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, an

electric motor, a switch therefor, a gear driven by said motor, a rack carried by the carriage and meshing with said gear, a clutch intermediate saidgea'r and motor, a spring actuated arm which.

tends to close said clutch, a rock shaft controlled in its'movement by the longitudinal movement of said bar, a, crank arm on said rock shaft that holds saldispring actuated arm against the force\ holding said bar at one end of its longitudinalmovement and from the control of which look the bar is released by its rocking movement, an electric motor, a switch therefor, a gear driven by said motor, a rack carried by the carriage and meshing with said gear, a clutch intermediate said gear and motor, a spring actuated arm which tends to close said clutch, a rock shaft controlled in its movement by the longitudinal movement of said bar, a crank arm on said rock shaft that holds said spring actuated arm against the force of its spring and maintains the clutch open when said bar engages its lock, means connected with said rock shaft for opening and closing said switch, automatically operating means for rocking said bar when the carriage reaches the end of a line, and key controlled means actuated at will for rocking said bar to return the carriage before it reaches the end of a line.

18. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, an electric motor, a switch therefor, a gear driven by said motor, a rack carried by the carriage and meshing with said gear, a clutch intermediate said gear and motor, a spring actuated arm which tends to close said clutch, a rock shaft controlled in its movement by the longitudinal movement of said bar, a crank arm on said rock shaft that holds said spring actuated arm against the force of its spring and maintains the clutch open when said bar engages its lock; means connected with said rock shaft for opening and closing said switch, and key actuated means for rocking said bar to release it from said lock and return the carriage, said key actuated. means including a trip-off device by which the connections between said key and bar may be broken enabling the bar to return to normal position even though the key be held depressed. 1

19. The combination of a carriage, and return mechanism therefor comprising a margin-stop carrying-bar mounted to rock on its longitudinal axis and also to move longitudinally, a lock. for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, a motor, a gear driven by said motor, a rack carried by the carriage and meshing with said gear, a clutch intermediate said gearand motor, operative connections between said bar and clutch that control the latter to open and close it by the longitudinal movement of the bar without interfering with or being affected by the rocking movement of the bar, and means for rocking said bar.

20. The combination of a carriage, and return mechanism therefor comprising a margin-stopcarrying-bar mounted to rock on itslongitudinal axis and also to move longitudinally, a lock for holding said bar at one end of its longitudinal movement and from the control of which lock the bar is released by its rocking movement, an electric motor, a switch therefor, a gear driven by said motor, a rack carried .by the carriage and meshing with said gear, a clutch intermediate said gear and motor, operative connections between said bar and the switch and between the bar and the clutch so that the longitudinal movement of the bar controls the opening and closing of the switch and clutch without interfering with or being affected by the rocking movement of said bar, automatically operating means for rock-- ing said bar when the carriage reaches the end of a line, and key controlled means for rocking said bar to return the carriage before it reaches the end of a line.

' 21. The combination of a carriage, return mechanism therefor comprising a motor, a clutch by which said motor may be operatively connected to the carriage to return it, a margin-stop-,

carrying-bar mounted for rocking and for longitudinal movement, the longitudinal movement of 22. The combination of a carriage, automatically operating and key controlled power actuated carriage return mechanism comprising a bar that has a longitudinal movement in the direction of the travel of the carriage, means for rendering the return mechanism effective by a longitudinal movement of said bar in one direction and for rendering the return mechanism ineffective by a longitudinal movement of the bar in the opposite direction, automatically operating means for bringing about a shifting of said bar to render the return mechanism effective when the end of a line is reached, a key, means controlled thereby for bringing about a shifting of said bar to render the return mechanism effective, and automatically operating means for preventing said key from being effective to bring about a shifting of said bar until the carriage has been advanced a,plurality of letter spaces from its position of arrest at the returnof the carriage whether the carriage has been automatically returned or has been returned with the aid of said key.

23. The combination of a carriage, automatically operating and key controlled power actuated carriage return mechanism comprising a bar that has a longitudinal movement and also a rocking movement, means for rendering the re turn mechanism effective by a longitudinal movement of said bar in one direction and for rendering the return mechanism ineffective by a longitudinal movement of the bar in the opposite direction, a lock for locking the bar against longitudinal movement at one end of its longitudinal throw, a key for rocking said bar and releasing it from its lock, and automatically operating- "means for preventing said key from being effective to rock said bar until the carriage has been advanced a plurality of letter spaces from its position of arrest at the return of the carriage.

24. The combination of a carriage, automatically operating and key controlled power actuated carriage return mechanism comprising a margin-stop-carrying-bar that is mounted for longitudinal and for rocking movement, means for rendering the return mechanism effective by a longitudinal movement of said bar in one direction and for rendering the return mechanism ineffective by a longitudinal movement of the bar in the opposite direction, a lock for locking said bar against longitudinal movement at one end of its longitudinal throw and from which the bar is cally operating and key controlled power actuated carriage return mechanism comprising a margin-stop-carrying-bar that is mounted for longitudinal and for rocking movement, means for rendering the return mechanism effective by a longitudinal movement of said bar in one direction and for rendering the return mechanism inefiective by a longitudinal movement of the bar in the opposite direction, a lock for locking said bar against longitudinal movement at one end of its longitudinal throwand from which the bar is released by a rocking movement, a key for rocking said bar, a counter stop with which a margin stop on said bar coacts to limit the return move--" ment of the carriage, and interengaging means on said stops that ooact when the carriage is arrested in its return movement and prevents a rocking of said bar until the carriage has'been advanced to release said interengaging means.

26. The combination of a carriage, automati-= cally operating and key controlled power actuated carriage return mechanism comprising a marginstop-carrying-bar that is mounted for longitudinal and for rocking movement, a key for rocking said bar, and automatically operating means for locking said bar against rocking movement until the carriage has been advanced from its position of arrest at the return of the carriage, whereby the key is rendered inefiective to rock said bar and bring about a return of the carriage until the carriage has advanced far enough from its position of arrest to permit the carriage return mechanism to 'function properly.

2'7. The combination of a carriage, automati cally operating and lrey controlled power actu atedcarriage return mechanism comprising a margin-stop-carrying=bar that is mounted for longitudinal and for rocking movement, a key for citing said bar, and automatically operating means for locking said bar against rocking move= ment until the carriage has been advanced from its position. of arrest at the or the car rlage, whereby the hey is rendered ineffective to roots said bar and bring about a return or the carriage until the carriage has advanced far enough from its position of arrest to permit the carriage mechanism to function properly, said au= tornatically operating means comprising an engaging member carried by a counter stop with which a stop on said bar coacts, said on gaging mem er brought into cooperative relation wi s margin stop to prevent a roclr= ing or the bar when the carriage reaches its re turn position.

it. The combination of a carriage, power actuated car iage return mechanism comprising a stop bar carried by the frame or the machine and mounted for longitudinal also for rocking movement, margin stops carried by and adjustable on said bar, means operatively connected with said bar ior rendering the power actuated means effective to return the carriage by a longitudinal movement of the bar in one direction and for rendering said power actuated means ineffective by a longitudinal movement of said bar in the opposite direction, a counter stop carried by the carriage and coacting with one or said margin stops to rock the bar and coacting with the other of said margin stops to shift the bar longitudinally and effect an arrest of the carriage, and a loci: that engages said bar and holds it against longitudinal displacement from the position to which it has been shifted by said counter stop in the return of the carriage and by a longitudinal movement of the bar in one direction and for rendering said power actuated means ineffective by a longitudinal movement of said bar in the opposite direction, a counter stop carried by the carriage and coacting with one of said margin stops to rock the bar and coacting with the other of said margin stops to shift the bar longitudinally and effect an arrest of the carriage, a lock that engages said bar and holds it against longitudinal displacement from the position to which it has been shifted by said counter stop in the return of the carriage and from which lock the bar is released by a rocking of said bar, and a key for rocking said bar and effecting a return of the carriage before it reaches machine and mounted for longitudinal and also for rocking movement, margin stops carried by and adjustable on said bar, means operatively connected with said bar for rendering the power actuated means effective to return the carriage by a longitudinal movement of the'bar in one direc tion and for rendering said power actuated means inefi'ective by a longitudinal movement of said bar 7 in the opposite direction, a counter stop carried by the carriage and coacting with one of said margin stops to reel; the bar and coacting with the other of said margin stops to shift the bar longitudinally and eilect an arrest of the car= rlage, a lock that engages said bar and holds it against longitudinal displacement from the po sition to which it has been shirted by said counter stop in the return of the carriage and from which lock the bar is released by a rocking of said bar, a for rocking said bar and effecting a return of the carriage before it reaches the end oi line, and locking means on said counter stop 1 which coact with a stop when the carriage has been returned to its point of arrest pro" vents reciting of the bar by said lrey until the carriage has been advanced from its return posi tion of arrest enough to permit the carriage return mechanism to function properly.

31. The combination of carriage, and power actuated carriage return mechanism comprising a margin stop bar-carried by; the frame or the machine mounted for longitudinal and also for rocking movement, margin stops carried by and adjustable on said a motor, a clutch by which said motor may be connected to the carriage to return it, means for opening the clutch by a longitudinal movement of said bar dill and from which lock the bar is released by a rocking of said bar.

32. The combination of a carriage, and power actuated carriage return mechanism comprising a margin stop bar carried by the frame of the machine and mounted for longitudinal and also for rocking movement, margin stops carried by and adjustable on said bar, an electric motor, a switch therefor, a clutch by which said motor may be connected to the carriage to return it, means by which a longitudinal movement of said bar in one direction opens said switch and clutch and a longitudinal movement of the bar in the opposite direction closes said switch and clutch, a counter stop carried by the carriage and coacting with one of said margin stops to rock the bar and coacting with the other margin stop to shift the bar longitudinally and open the switch and clutch, and a lock that engages said bar and holds it against longitudinal displacement from the position to which it has been shifted by said counter stop in the return of the carriage and from which look the bar is released by-a rocking of said bar.

33. The combination of a carriage, and power actuated carriage return mechanism comprising a margin stop bar carried by the frame of the ma. chine and mounted for longitudinal and also for rocking movement, margin stops carried by and adjustable on said bar, an electric motor, a switch therefor, a clutch by which said motor may be connected to the carriage to return it, means by which a longitudinal movement of said bar in one direction opens said switch and clutch and a longitudinal movement of the bar in the opposite direction closes said switch and clutch, a counter stop carried by the carriage and coacting with one of said margin stops to rock the bar and coacting with the other margin stop to shift the bar longitudinally and open the switch and clutch, a lock that engages saidbar and holds it against longitudinal displacement from the position to which it has been shifted by said counter stop in the return of the carriage and from which look the bar is released by a rocking of said bar, and a key connected to said bar for rocking it to release the bar from control of its said lock.

34. The combination of a carriage, and power actuated carriage return mechanism comprising a margin stop bar carried by the frame of the machine and mounted for longitudinal and also for rocking movement, margin stops carried by and adjustable on said bar, an electric motor, a switch therefor, a clutch by which said motor may be connected to the carriage to return it, means by which a longitudinal movement of said bar in one direction opens said switch and clutch and a longitudinal movement of the bar in the opposite direction closes said switch and clutch, a counter stop carried by the carriage and coacting with one of said margin stops to rockthe bar and coacting with the other margin stop to shift the bar longitudinally and open the switch and clutch, a lock that engages said bar and holds it against longitudinal displacement from the position to which it has been shifted by said counter stop in the return of the carriage and from which look the bar is released by a rocking of said bar, a key connected to said bar for rocking it to release the bar from control of its said lock, and locking means on said counter stop which coact with a margin stop when the carriage has been returned to its point of arrest and prevents a rocking of the bar by said key until the carriage has been advanced from its return position of arrest far enough to permit the carriage return mechanism to function properly.

35. The combination of a carriage and automatically operating return mechanism therefor comprising a motor, a longitudinally movable margin-stop-carrying-bar shiftable longitudinally in both directions under the control of the carriage, means controlled by the longitudinal movement of said bar in one direction for starting the motor and controlled by the movement of said bar in the opposite direction for stopping said motor, and manually controlled means readily settable at will for locking and retaining indefinitely said bar against longitudinal movement and thus render said carriage return mechanism inoperative to return the carriage.

36. The combination of a carriage and automatically operating carriage return mechanism therefor comprising a motor, a longitudinally movable margin-stop-carrying bar shiftable longitudinally in both directions under control of the carriage, a clutch intermediate said motor and carriage, and means controlled by the longitudinal movement of said bar in one direction to close said clutch and controlled by the movement of the bar in the opposite direction 'to open said clutch, and manually controlled means readily settable at will for locking and retaining in-' definitely said bar against longitudinal shifting movement and thus render said carriage return mechanism inoperative to return the carriage.

3'7. The combination of a carriage and automatically operating carriage return mechanism therefor comprising a motor, a switch for said motor, a longitudinally movable margin-stopcarrying bar shiftable longitudinally in both directions under control of the carriage, a clutch intermediate said motor and carriage, and means controlled by the longitudinal movement of said bar in one direction to close said clutch and switch and controlled by the movement of the bar in the opposite direction to open said clutch and switch, and manually controlled means readily settable at will for locking and retaining indefinitely said bar against longitudinal shifting movement and thus render said carriage return mechanism inoperative to return the carriage.

38. The combination of a carriage, and power actuated return mechanism therefor comprising a motor, a clutch intermediate said carriage and motor, a margin-stop-carrying bar mounted for rocking movement and also for longitudinal shifting movements, a catch for holding said bar at the end of its longitudinal shifting movement in one direction and from control of which catch the bar is released by a rocking movement of said bar, means controlled by the longitudinal move-- ment of said bar in one direction for closing said clutch and controlled by the movement of the bar in the opposite direction for opening said clutch, a key, and means controlled by said key for rocking said .bar and freeing it from said mechanism ineffective.

FREDERICK A. HART. 

